Move README.dfu to doc/usage/dfu.rst and convert to reStructured text.

In the long run this page should be split into two. One for the overview
and one for the dfu command. UEFI capsule updates and dfutftp should be
integrated into the overview page.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

Define a new 'SCRIPT' type for DFU entities. The downloaded data are
treated as simple u-boot's scripts and executed with run_command_list()
function.

Flashing the 'SCRIPT' entity might result in changing the 'dfu_alt_info'
environment variable from the flashed script, so add a global variable
for tracking the potential need to reinitialize the dfu_alt_info related
structures.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

Define a new 'SKIP' type for the DFU entities. The flashed data for that
entity is simply ignored without returning any error values.

This allows to have one flashing procedure and images for the different
board types or variants, where each board uses only the images relevant
to it and skips the rest. This is especially usefull for the THOR
protocol, which usually transfers more than one file in a single session.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Minkyu Kang <mk7.kang@samsung.com>
[mszyprow: rephrased commit message and docs for easier reading, changed
	   subject to "dfu: add 'SKIP' entity"]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

Fix "ram" typos for serial flash

Signed-off-by: Chance.Yang <chance.yang@vatics.com>

Fix some typos.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Lukasz Majewski <lukma@denx.de>

In dfu_alt_info for eMMC the eMMC partition number can be specified.

The separator in dfu_alt_info is a semicolon not a comma.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Lukasz Majewski <lukma@denx.de>

When the `dfu` command is called from the U-Boot environment,
it now accepts an optional parameter that specifies a timeout (in seconds).
If a DFU connection is not made within that time the `dfu` command exits
(as it would if Ctrl+C was pressed). If the timeout is left empty or being
zero the `dfu` command behaves as it does now.

This is useful for allowing U-Boot to check to see if anything wants to
upload new firmware before continuing to boot.

The patch is based on the commit
https://github.com/01org/edison-u-boot/commit/5e966ccc3c65c18c9783741fa04e0c45e021780c
by Sebastien Colleur, which has been heavily reworked due to U-Boot changes
in the past.

Signed-off-by: Brad Campbell <bradjc5@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Add weak callback to allow board specific behavior
- flush
- initiated

This patch prepare usage of DFU back end for communication with
STM32CubeProgrammer on stm32mp1 platform with stm32prog command.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>

Add a virtual DFU backend to allow board specific read and write
(for OTP update for example).

Acked-by: Lukasz Majewski <lukma@denx.de>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>

Add the support of MTD partition for the MTD backend.

The expected dfu_alt_info for one alternate on the mtd device :
	<name> part <part_id>
        <name> partubi <part_id>

"partubi" also erase up to the end of the partition after write operation.

For example: dfu_alt_info = "spl part 1;u-boot part 2; UBI partubi 3"

U-Boot> dfu 0 mtd nand0

Acked-by: Lukasz Majewski <lukma@denx.de>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>